That's kind of cool. Wonder if you could use that same kind of radial clamp on a small die handle and hold several sizes and shapes of dies -- hex and round. I always seem to have the wrong handle for the particular die I need.

Well i guess you could.. if you make it smaller.. My animation there is specified to a 180mm opening. ;)

The trick was to get the "straight" slots matching curved slot just right.. The 3 large curved slot has static bolts. the straight slot has a short matching "travel" slot behond the actuating plates.. The "teeth" is just triangles with the correct distance between bolt holes.

Its not my idea. i just reverse engineered it from images and videos i found. =)